Re: mpc8248 SEC -- interrupt handler 'is' invoked

["Vikas Aggarwal" <va824363@albany.edu>]

Hi Kim,
Yes, i checked to my knowledge that i am doing all these steps and also
checked the
bit positions.

I will send you the code excerpts. The code was written for 2.4 kernel and
8555E(downloaded from freescale)  and i ported it to  8248/kernel 2.6.

thanks for your help
-vikas


> On Sun, 31 Jul 2005 20:48:16 -0400 (EDT)
> "Vikas Aggarwal" <va824363@albany.edu> wrote:
>
>> Tried it as u said . No luck :(
>> But something more i noted now in CPSR(channel pointer status
>> register=0x2040)  that before ISR invoked it has 0x0:0x7.
>>
>> After ISR invoked it has 0x7:0x2007 .  The 7 in low bits means
>> channel_error and 2 is at "reserved" bits as per documentation, don't
>> know
>> what that means.
>>
>> I also tried kmalloc with GFP_DMA, for the memory where i create the
>> Descriptor.
>> Please keep giving ideas for debugging this as this is what driving me
>> right now.
>> regards
>> -vikas
>
>
> So you reset the master, then the channel, allocate the RNG descriptor,
> allocate the random data buffer, fill the descriptor with values for an
> RNG request the size of your buffer (filling with the physical address of
> your random data buffer), and submit the descriptor's physical address to
> the FR..
>
> btw, I'm finding it hard to help without seeing sec register transaction
> data, descriptor data, virtual and physical addresses, etc.
>
> Kim
>